Development of a new functional elastomeric material and its application to semi-active vibration control of machines and structures

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In this study, the stiffness controllable elastomer composites named as MRE is fabricated and their field-dependent static and dynamic properties are tested. When such material is exposed to external magnetic field, the strength of the inter-particle force will change and thus its apparent elastic modulus is changed depending on the magnitude of the field. The MRE is then applied to the vibration isolating mounts along with variable stiffness control scheme. Experimental investigations show that the vibration of the one-degree of freedom structure that is exposed to base excitation can be effectively reduced by the intermediating MRE mounts according to the semi-active on/off switching control algorithm.